255645028897 has 2 divisors, whose sum is σ = 255645028898. Its totient is φ = 255645028896.

The previous prime is 255645028871. The next prime is 255645028913. The reversal of 255645028897 is 798820546552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230703459856 + 24941569041 = 480316^2 + 157929^2 .

It is a cyclic number.

It is not a de Polignac number, because 255645028897 - 2¹¹ = 255645026849 is a prime.

It is not a weakly prime, because it can be changed into another prime (255645028097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127822514448 + 127822514449.

It is an arithmetic number, because the mean of its divisors is an integer number (127822514449).

Almost surely, 2^255645028897 is an apocalyptic number.

It is an amenable number.

255645028897 is a deficient number, since it is larger than the sum of its proper divisors (1).

255645028897 is an equidigital number, since it uses as much as digits as its factorization.

255645028897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384000, while the sum is 61.

The spelling of 255645028897 in words is "two hundred fifty-five billion, six hundred forty-five million, twenty-eight thousand, eight hundred ninety-seven".